Door opening/closing device
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorMikio Ichinose
Life of this patent
Estimating the term…
Abstract
A device for controlling a door operated by a motor includes an opening/closing mechanism that opens and closes the door, and a gear mechanism that includes a plurality of tooth units each of which has different mesh and that conveys a torque of the motor to the opening/closing mechanism. The tooth units include a low-torque tooth unit that convey a relatively low torque, and a high-torque-tooth unit that conveys a relatively high torque. The torque conveyed to the opening/closing mechanism is changed by selecting a tooth unit based on a position of the door at the time of starting an opening or closing operation of the door.
Claims4
A device for controlling a door operated by a motor, comprising:
- an opening/closing mechanism configured to open and close the door;
- and
- a gear mechanism including a plurality of tooth units each of which has different mesh, and configured to convey a torque of the motor to the opening/closing mechanism, wherein the torque conveyed to the opening/closing mechanism is changed by selecting a tooth unit based on a position of the door at the time of starting an opening or closing operation of the door.
A device for controlling a door operated by a motor, comprising:
- an opening/closing mechanism configured to open and close the door;
- a gear mechanism including a plurality of tooth units each of which has different mesh, and configured to convey a torque of the motor to the opening/closing mechanism, wherein the torque conveyed is changed by selecting a tooth unit based on a position of the door at the time of starting an opening or closing operation of the door;
- and
- a controller configured to control the motor in such a manner that a rotation speed of the motor gradually changes while the tooth units are being switched.
Dependencies are inferred from the claim text.